Shuttle-throwing device



H;.-=L:ND`SAY. SHUTTLE THROWlNG DEVICE. APPLICATION :Ffl'Lm JULY m 1920.

1,380,224@` Patented May 31,1921.

- f; 22 l if?. ZQYM 21 /18 UNITED STATES PATENT OFFICE.

HAMILTON LINDSAY, OF CLEVELAND, OHIO, ASSIGNOR TO THE LINDSAY WIRE WEAVING COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

SHUTTLE-THROWING- DEVICE.

Application led July 14,

To all 'whom t may concern.'

Be it known that I, HAMILTON LINDSAY, a citizen of the United States, residing at Cleveland in the county of Cuyahoga and Stateof hio, have invented a certain new and useful Improvement in Shuttle-Throw7` ing Devices, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to devices for operating the picker arms of a loom used for weaving wire cloth, and in particular to that type of loom such as set forth in my prior Patents #731,112 and 1,052,929.

The object of this invention is to provide suitable mechanism which will have ample power for throwing the shuttle from one side to the other of a large loom, and which will comprise a small, simple and compact unit. Another object is to provide a shuttle throwing mechanism which will not be affected by the excessive vibration which is always present on a large machine.

1The above and other objects will be more fully set forth in the following description which relates to the drawings and the essential characteristics are set forth 'in the claims.

In the drawings Figure 1 is a front elevation of a wire weaving loom embodying the features of my invention; Fig. 2 is a plan of part of the machine; Fig. 3 is a section of a bracket carrying a spring tension device; Fig. 4 is a section through a retaining bracket.

Designating the v parts by the use of reference characters in Fig. 1, 10 represents the frame of a wire weaving machine having` the customary batten 11, shuttle boxes 12, guide roller 13 and cloth beam 14. The picker arms 15 pivotally mounted on an extension 16 of the lay top 9, in addition to the above name'd parts, constitute the mechanismy covered by the said prior Patents, #731,112 and 1,052,929 and form no part of the case. j i

My invention comprises the mechanism adapted to operate the picker arm 15 after a trigger mechanism, not shown, has been released. To this end I provide spring operated rods 17, preferably a pair for each picker arm, one pair of which is positioned at each side of the lay top 9, near the top thereof, and connected directly to the picker arms 15. The picker arms 15 are adapted to Specication of Letters Patent. i Patented May 31, 1921.

1920. Serial No. 396,328.

carry picker blocks and are substantially l. shaped members pivotally mounted in bearings 18 on the extension 16 of the lay top 9. The customary mechanism for returning the picker arms is secured to the lower end of a flexible connection 19 which is set forth in the said prior Patent #7 31,112.

The upper end 20 of the picker arm carries buffer plates 21 which are adapted to abut flexible retaining pieces for taking up the energy of the picker arm impelling mechanism. A retaining bracket 22 may have a fiat top 23 and be rigidly secured to the' top of the lay 9', and so positioned that the buffer plate 21, will strike the center of the top portion 23. To prevent excessive noise and vibration due to the impact/of buffer plates against the retaining piece I provide a block of flexible material 24 such as rubber. This block may be secured to the retaining bracket by rivets or by any well known suitable means.

As an impelling mechanism for each picker arm I provide on each side of the machine a pair of links 17 comprising a rod having one end pivotally mounted in bearings 25 on the picker arm. This point of connection is preferably below the pivoted connection 18 and on a line with the top of the lay 9. By so positioning the rods with relation to the lay top it is possible to utilize a great part of expended energy directly on the picker arm. The free end of each rod 17 passes through an opening in the ear 26 of a bracket 28 and is held therein by a compression spring 29. This bracket 28 may be rigidly bolted to the'lay top and be positioned near the extreme right and left hand end of the' machine. By providing a pair of springs and links to each picker arm I have found that a forceful and effective motion may be imparted to a picker arm.

To regulate the strength of the blow with lwhich the shuttle is to be struck by the picker arms I provide an adjusting `nut 3() which is adapted to be moved on `a threaded portion 31 of the rod 17. Each spring may be so adjusted that the' energy for impelling the picker arm is equally distributed, and I have found that with such an arrangement` an operator may adjust the tension in the springs, without injuring himself or the work.

The rod 17 is slidably mounted in the bracket 28 and the aperture through which it slides must be large enough to prevent the occurrence of any binding action between the rod and the ear. When the picker arin moves forward it will be seen from the drawings that the pivoted connection 25 nieves in the-arc of a circle about the pivoted connection 18 and that suliicient elearance must be provided to compensate for this curvilinear motion.

In operation, suitable mechanism .geared from the drive shaft of the machine operates to draw the picker arms to the position as shown on the left hand side of the machine in Fig. 1. Assuming that the shuttle has entered the' shuttle box on the left hand side of the machine and the batten has pressed the warp thread into position, then when the trigger mechanism releases the flexible connection 19, the ii'npelling mechanism loperates to drivethe shuttle to the right handside' of the machine.

The impelling mechanism comprises the hereinbefore mentioned compression `spring with the corresponding connection to the picker arm. lVhen the lower .portion of the picker arm moves toward the machine the upper portion of the arm moves in a circular path about the pivoted connection 18 until it strikes the block 2li. The picker-arm will then be in a position shown on the right hand side of the machine in 1. The mechanism geared to the flexible connertion 19 then draws the upper end 2O of the picker arm downward and at the same time compresses the spring 29. The picker arm mechanism is vkthen ready for another cycle ofy operation.

Having thus described my invention, I claim 1.l In a shuttle throwing device, the combination with a vbatten frame, of a picker arm pivoted overhead to the frame, and means for operating said arm in one dii-,ection to throw a shuttle, said means comprising two members each having one end thereof secured to the picker arm below the point about which said arm is pivoted, and the other end thereof yieldingly mounted at the end of the batten frame.

2. In a shuttle throwing device, the combination with a batteii frame, of a picker arm pivoted overhead thereto, means for imparting a shuttle throwing movement to the arm, said means comprising a spring mounted at the end of the frame, and a link means connecting said spring with the picker arm, said link being connected to the picker arm at a point below the pivoted connection therefor.

3. In a shuttle throwing device, the combination with a batten frame, of an overhead picker arm secured thereto, a spring on each side and at the end of the frame', links connecting each spring to the picker arm, and

means carried by the links for adjusting the tension on the springs whereby adjustments may be made from the side of the loom..

4. In a loom, the combination with a batten frame, of a picker arm pivoted overhead thereto, a pair of springs carried by the frame, and links connecting the springs to the picker arm ata point below the pivoted connection therefor.

5. In a shuttle throwing device, the combination with a frame of a picker arm pivotally mounted overhead thereon, a pair of springs connected with the arm on one side of the pivoted connection for imparting a shuttle throwing movement to the picker arm, and means connected with the picker arm on the opposite side of the pivoted connection for stopping the shuttle throwing movement.

6. In a shuttle throwing device, the combination with a batteri frame, of a picker arm pivoted thereto, a pairof links carried by the picker arm and on one side of the pivot point, a buffer carried by the arm on the other side of thepivot point, a pair of compression springs associated with the links and mounted at the end of the frame, means for connecting the springs to the frame and adjusting means for said springs, said adjusting means being positioned at the end of the frame whereby the tension in the spring may be regulated from the side of the loom. Y

7. In a shuttle throwing device, the coinbination with a batten frame of a picker arm, pivoted overhead to the frame, a buffer plate carried by the picker arm above the pivoted connection, a bracket adapted to straddle said buffer plate to limit the upward, movement of said picker arm, a pair of compression springs adapted to impart movement to the picker arm, said vsprings being carried by the frame and positioned at the end thereof, and means connecting said picker arm below the pivoted connection with said springs.

8. In a shuttle throwing device, .the combination with a hatten frame, of a picker arm pivoted thereto, a pair tof brackets rigidly secured to the frame, a pair of links, one end thereof being slidably mounted within the brackets and the other end thereof being pivotally connected to said picker arm, a pair of springs adapted to constantly urge said links in one direction, and means for adjusting the tension in said springs.

9. In a shuttle throwing device, the combination with a batten frame, ofra picker arm pivoted. thereto, a pair of brackets secured to the opposite sides of the frame respectively, a pair of links, one end thereof being slidably mounted within the brackets and the other end thereof being pivotally connected to said picker arm, and a pair of springs adapted to constantly urge said links in one direction.

l0. In a loom, the combination with a batten frame, of a picker arm pivoted overhead thereto, a pair of links, one of said links being Carried on each side of the frame, and each having one end thereof connected to the picker arm, and the other end thereof carried by the frame, a compression spring associated with each of said links, and means 10 for adjusting the tension on said springs, said adjusting means being positioned at the end of the frame whereby adjustments may be made from the side of the loom.

In testimony whereof, I hereunto aiiiX my 15 signature.

HAMILTON LINDSAY. 

